Abrasive compound



Patented F b. ,25, 1930 I a 1,743,778 r UNITED STATES. PATENT omce ROBERT s. marries, or warnmsurw, connecrrcur aicnasrvr: comroimr No Drawing. Application filed march 7.192s. seriaino. 259,925.

This invention relatesto abrasive preparacleaning operation, but a lacquer or other tions, and more particularly to a solid greaseprotecting coating may be supplied immedi'- less compound to be used to produce a thin ately after the abradingoperation. flexible coating of abrasive on wheels for pro.- A specific example ofthe invention.will= I ducing brushed or satin finishes 'on now be described h v 55 metals, such as brass, bronze, German-silver, pounds of ground glue are first soaked in .steel, copper,'silverware, etc., and for abrad- 32 pounds of cold. water from one to two ing and finishing other surfaces. hours. 3'ounces of beta naphthol are then n One object of the present invention is to added, and the mixture is heated about half 1 10 provide an abrasive compound which may be an hour over a water bath at about 150 decheaply manufactured, which will fbegeasy' grees until completely dissolved. 95 and safe to apply, which will produce a lastpounds of finely ground abrasive, such as alu ing finish, which when properly encased will minium oxide, are then added to'the-glue sonot deteriorate in storage, and which will be lution, while vigorously stirring the mass-to capable ofwith'standing eat, cold, and moist thoroughlyincorporate the abrasive. A soair conditions. v lution consisting of a mixture of 47.8 cc. forj A further object is to provide a greaseless malin' (40% formaldehyde solution) and abrasive compound-which will eliminate the 142.2 cc. of gylcerine is then added to the mixusual preliinina cutting down operation ture of hot glue and abrasive, and the entire and the final was ing and drying operations. mass is stirred thoroughly for about six min- A further object is to provide an abrasive utes, or'until ready to be poured into suitable compound which when in use will,effect a molds or containers. After allowing I the great reduction of, the spoilage and rejec compound to cool and set for about 5 hours, tions due to staining or scratching occurring the containers ofjmoist compound may be in the final washing and dryin operations; shipped to the trade. The hmixture after 75 Brushed surfaces are genera 1y produced pouring will then have the following rowith a brush by the use of oil and pumice, portionsyglue 7.27%, beta naphthol .13 water andpumice, or grease-containing comwater 23.25%, brasive. 69.00%, formalin binations. One disadvantage ,of such com .O82%, and glycerine 285%. I pounds was that they would not adhere to'the Preferably however, the solidified material wheel but would fly off and deposit a layer on will be removed from the molds before ship the work, covering it up so that the progress ing and dried for a period of from 5 hours of the o eration could not be seen. Moreto 3 weeks so as to reduce the moisture conr 'ov'er,b'e ore such ggrklcnnldber-lacquered or--tent: 7 i v f covergdwi-th a protective coating, it had to The material may then be coated .with a /Wwashed thoroughly and dried; This water-proof material, such as lacquer or varcaused a big percentage of spoilage due, to nish, to prepare itfor shipment.

taining,"scratching, and'spotting out. The'invention, broadly construed, lies in By means of the present invention, the the compounding of glue, beta naphthol, wa-

40 above and other disadvantages have, been ter, abrasive, formalin, and glycerine in the 90 avoided, and an abrasive com und has been 'givenproportions. The glue acts as a binder produced which besides avoi g s everal'of for the other ingredients and causes the theusual operations, will adhere tenaciously abrasive to adhere to the wheel. The water to the wheel and will not de osit on the acts 'as'asolve'nt and asoftening agent. The work durivrvllg'l' the operation. onsequently, betanaphtholacts asapreservative to prevent. the work be left clean, so that the finish decomposition of. the glue. The formalin the wheel is producing be-visible to the combines chemicall with the glue to form operator at Moreover, since the an insoluble substance of highmelting point a rasive remains on'the wheel, the work --'and causing the compound to have a ru bernot'have'to be subjected toanysubsequent. like consistency. The glycerine acts as a re mo tarding agent for preventing too'rapid'hardening or setting of the greaseless compound which might interfere with the ease of pour- F ing wheel which is a plurality of loose muslin discs. The bar the greaseless compound, it .may be main 4 ing and drying.

the modifications and embodiments ing it into thes'hipping containers or molds. The greaseless compound is preferably marketed in the form of a cylindrical bar,

and as described above, is either cast in a container or coated wltha waterproof mate.-

rial. In use, the end of the bar of coinpound will be pressed against a grease-free revolvpreferably constructed of is held againstthe revolving wheel until a thin layer of the greaseless compound has been deposited, after which the wheel is allowed to rotate for at least 15 seconds longer before using, so that its moisture content will be sufliciently dried out. The wheel with its thin dry flexible coating is then ready for the cutting down or finishing operation, the artiole being held against the revolving wheel until the desired finish has been secured. The articlemay then be lacquered or coatedin the usual way without the necessity of washan agent for combining with said glue for raising themelting point of the mass, said preparation being transferable to a buifing or polishing implement by rubbing action.

In testimon where'of,- I have aflixed my signature to this specification. e

. ROBERT S. LEATHER.

. After the wheel has oncebeen' coated with condition bythe tained in proper working of the compound.

use of only a small amount The chief advantage of the present inven-' tion is that it eliminates two or more costly operations in the cutting. down or finishing process as mentioned abov I While there has been disclosed in this speci-' fication one example of how the invention may be embodied, it willbe understood that the'inven'tion is not to be limited to this ex ample, but may be modified and embodied in various ways without departing from its spirit. In short, the-invention includesall coming within the scope of the followings claims.

' Having thusfully described the invention, what is claimed as new and for which it is L glue and formaldehy e, said preparation be- I ing readily transferable to a revolving bufling wheel by friction.

4. An abrasive preparation comprising a mixture of about 7% glue, 23% water, 69%- abrasive, .08% formalin, and 29% glycerineI 5. A solid abrasive preparation comprising a mixture of glue, water, abrasive, and

risingsa-.. I 

